<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图 -->
    <el-card>
      <!-- 提示信息 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      ></el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center=""
      >
        <!-- 步骤条 -->
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"> </el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 左侧TEB栏 -->

      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTableave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input
                v-model="addForm.goods_name"
                style="width: 500px"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input
                v-model="addForm.goods_price"
                style="width: 500px"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input
                v-model="addForm.goods_weight"
                style="width: 500px"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input
                v-model="addForm.goods_number"
                style="width: 500px"
                type="number"
              ></el-input>
            </el-form-item>
            <!-- 商品分类 -->
            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 级联选择器 -->
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                expand-trigger="hover"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name + ' :'"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组放置位置 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  size="small"
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox> </el-checkbox-group
            ></el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name + '：'"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 图片上传功能 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" style="margin-top:15px " @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog
  title="图片预览"
  :visible.sync="previewVisible"
  width="30%">
  <img :src="previewPath" alt="预览图片" class="previewImg">  
</el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      activeIndex: "0",
      // 添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: "0",
        goods_weight: "0",
        goods_number: "0",
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics:[],
        // 商品的详情描述
        goods_introduce:'',
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
      // 商品分类列表
      catelist: [],
      // 获取到的三级分类商品动态参数
      manyTableData: [],
      // 获取到的三级分类商品静态参数
      onlyTableData: [],
      // API地址
      uploadURL: `http://127.0.0.1:8888/api/private/v1/upload`,
      // 上传图片时的headers请求头对象
      headerObj:{
        Authorization:window.sessionStorage.getItem('token')
      },
      previewPath:'',
      // 对话框隐藏与显示
      previewVisible :false,
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
    };
  },
  created() {
    this.getCatList();
  },
  methods: {
    // 获取所有商品分类数据
    async getCatList() {
      const { data: res } = await this.$http.get("categories");

      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败");
      }
      this.$message.success("获取商品列表成功");
      this.catelist = res.data;
    },
    // 级联选择器选中项变化的函数
    handleChange() {
      console.log(this.addForm.goods_cat);
      // 如果选择的不是三级分类那么就把input清空
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    // 页面跳转
    beforeTableave(activeName, oldActiveName) {
      // console.log('即将进入的标签页是:'+activeName)
      // console.log('即将离开的标签页是:'+oldactiveName)
      // return false
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类离开");
        return false;
      }
    },
    async tabClicked() {
      console.log(this.activeIndex);
      // 如果 获取的字符串是1的话，证明访问的是动态参数面板
      if (this.activeIndex === "1") {
        console.log("商品参数面板");
        // 发送获取动态参数请求
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            // 绑定参数为many
            params: {
              sel: "many",
            },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败！");
        }
        // 打印所获取到的三级分类
        console.log(res.data);
        // 三元表达式，如果item.attr_vals项为1个时，直接提交数据，如果不为0个时split分割数据
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        //  提交参数数据
        this.manyTableData = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态参数列表失败！");
        }
        this.onlyTableData = res.data;
        console.log(res);
      }
    },
    // 图片预览
    handlePreview(file) {
      console.log(file)
      this.previewPath = 
      file.response.data.url
      this.previewVisible = true
    },
    // 监听图片上传成功
    handleSuccess(response){
      console.log(response)
      // 1、拼接得到一个图片信息对象
      const picInfo ={pic:response.data.tmp_path}
      // 2、将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo)
      // 控制台打印数据，在pics中临时保存路径
      console.log(this.addForm)
    },
    // 移除图片
    handleRemove(file) {
      console.log(file)
      // 1、获取将要删除的图片的灵饰储存路径
      const filePath =file.response.data.tmp_path
      // 2、从pics数组中 ，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x =>
      x.pic===filePath)
      // 3、调用数组的splice方法 ，把图片信息对象，从pics中移除
      this.addForm.pics.splice(i,1)
      console.log(this.addForm)
    },
    // 富文本添加商品按钮
    add(){
      console.log(this.addForm)
    }
  },
  computed: {
    // 计算属性
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg{
  width: 100%;
  // height: 100%;
}
</style>